Hey, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.85%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 491 days | 100% |
| Anne | 7/10 | 826 days | 71% |
| ros fraser | 4/10 | 2836 days | 2% |
| wynden | 1/10 | 2864 days | 1% |
| Rado Hank | 10/10 | 2951 days | 3% |
| Lizzie Edmonds | 8/10 | 2952 days | 3% |
| Anis Quentin | 7/10 | 2959 days | 3% |
| Jeny Smolders | 7/10 | 2963 days | 3% |
| Oscar Petersen | 8/10 | 2970 days | 3% |
| Ani | 9/10 | 3079 days | 3% |
| Martin Murlik | 8/10 | 3191 days | 3% |
| Laura | 9/10 | 3202 days | 3% |
| Melanie Farrell | 7/10 | 3210 days | 3% |
| Andy | 10/10 | 3217 days | 3% |
| Julia Achatz | 5/10 | 3231 days | 2% |
| Auba Mateos | 7/10 | 3237 days | 3% |
| Charlotte | 7/10 | 3237 days | 3% |
| Isabel Zedelius | 8/10 | 3240 days | 3% |
| Dries | 8/10 | 3280 days | 3% |
| Clarissa Glaser | 8/10 | 3281 days | 3% |
| Alna | 10/10 | 3286 days | 3% |
| Holger Worner | 9/10 | 3286 days | 3% |
| Karlee Hormell | 9/10 | 3295 days | 3% |
| Alonso | 9/10 | 3299 days | 3% |
| Rose Guillaume | 8/10 | 3302 days | 3% |
| Caroline Coudray | 8/10 | 3306 days | 3% |
| Barbara | 8/10 | 3306 days | 3% |
| Leonie Brabers | 7/10 | 3314 days | 2% |
| Bina Johansson | 10/10 | 3314 days | 3% |
| Sam Staines | 9/10 | 3318 days | 3% |
| Erik | 6/10 | 3321 days | 2% |
| Nicole Signer | 8/10 | 3328 days | 2% |
| Sam Taylor | 7/10 | 3332 days | 2% |
| Vanuxem | 8/10 | 3536 days | 2% |
| Clara Bertomeu | 10/10 | 3536 days | 2% |
| Lukas Boller | 9/10 | 3538 days | 2% |
| Mette Elholm | 7/10 | 3552 days | 2% |
| Mathilde Arp | 8/10 | 3552 days | 2% |
| Chloe and Guillame | 9/10 | 3556 days | 2% |
| Andre | 9/10 | 3558 days | 2% |
| Doerte | 10/10 | 3558 days | 2% |
| Saskia Peek | 9/10 | 3559 days | 2% |
| Erika Tarant | 8/10 | 3559 days | 2% |
| Jennifer Nguyen | 7/10 | 3560 days | 2% |
| Julie Duvert | 7/10 | 3560 days | 2% |
| Dan Ramsl | 4/10 | 3560 days | 1% |
| Lucy Mulvin | 7/10 | 3561 days | 2% |
| Fine Kochling | 9/10 | 3563 days | 2% |
| Eberhard | 9/10 | 3563 days | 2% |
| Hannes | 8/10 | 3564 days | 2% |
| Calum Penn | 9/10 | 3566 days | 2% |
| Arthur Portolleau | 6/10 | 3567 days | 2% |
| Elisabet | 10/10 | 3568 days | 2% |
| Tommy Mannien | 8/10 | 3569 days | 2% |
| Solange Bourbeois | 8/10 | 3572 days | 2% |
| Talissa Missiato | 10/10 | 3572 days | 2% |
| Severin Knegsch | 9/10 | 3573 days | 2% |
| Pierre Jouffineau | 10/10 | 3574 days | 2% |
| Lewis Whittle | 8/10 | 3576 days | 2% |
| Ben and Pauline | 8/10 | 3578 days | 2% |
| Ann-Kathrin | 7/10 | 3583 days | 2% |
| Natasha Harbinson | 10/10 | 3584 days | 2% |
| Sebastian | 2/10 | 3585 days | 1% |
| Jaquein Bucholz | 3/10 | 3585 days | 1% |
| Chiara | 7/10 | 3585 days | 2% |
| Cariotta Kemper | 3/10 | 3585 days | 1% |
| Megan Lenox | 7/10 | 3588 days | 2% |
| Max Mustermann | 8/10 | 3590 days | 2% |
| Amy Stafford | 8/10 | 3593 days | 2% |
| Carl | 7/10 | 3593 days | 2% |
| Briony | 7/10 | 3595 days | 2% |
| Melanie Kronbichler | 8/10 | 3596 days | 2% |
| Andreas Schiefer | 7/10 | 3597 days | 2% |
| Veronique Kaplan | 3/10 | 3599 days | 1% |
| Robin Ings | 6/10 | 3600 days | 2% |
| Stula Vladimir | 7/10 | 3601 days | 2% |
| David Soukal | 8/10 | 3601 days | 2% |
| Olivia Aliprandi | 7/10 | 3602 days | 2% |
| Isabelle | 2/10 | 3604 days | 1% |
| Jonathan Gourmel | 8/10 | 3604 days | 2% |
| Mikkel Palleson | 4/10 | 3607 days | 1% |
| Franziska and Sabine | 7/10 | 3608 days | 2% |
| Chloe Guerillot | 7/10 | 3608 days | 2% |
| Faye Oliver | 7/10 | 3610 days | 2% |
| Iris Kerbler | 9/10 | 3610 days | 2% |
| Til Schaebitz | 6/10 | 3611 days | 2% |
| Elisabeth Grabner | 9/10 | 3613 days | 2% |
| Berith | 10/10 | 3613 days | 2% |
| Chris Simpson | 6/10 | 3616 days | 2% |
| Pekka and Jonna | 9/10 | 3616 days | 2% |
| Jonas Hoerning | 8/10 | 3617 days | 2% |
| Nils | 10/10 | 3617 days | 2% |
| Mark Rosema | 8/10 | 3618 days | 2% |
| Lisa Huber | 10/10 | 3618 days | 2% |
| Nicola Wiggan | 9/10 | 3639 days | 2% |
| Linda and Gunther | 4/10 | 3640 days | 1% |
| Julie | 9/10 | 3641 days | 2% |
| Maria Schaer | 7/10 | 3645 days | 2% |
| Mette and Jesper | 5/10 | 3647 days | 1% |
| Pierre and Alexandra | 6/10 | 3653 days | 1% |
| Julia Waenninger | 8/10 | 3665 days | 2% |
| Sarah Boettcher | 9/10 | 3701 days | 2% |
| Suzanne Vermeulen | 6/10 | 3718 days | 1% |
| Blandine Giusti | 7/10 | 3921 days | 1% |
| Bart Hanssen | 6/10 | 4000 days | 1% |
| Astrid Egesten | 7/10 | 4052 days | 1% |
| Jean Curry | 9/10 | 4275 days | 0% |
| Carla Oyarzun | 1/10 | 4279 days | 0% |
| Philippe Chiasson | 9/10 | 4285 days | 0% |
| Helma Druyken | 4/10 | 4295 days | 0% |
| Florian Guttler | 7/10 | 4298 days | 0% |
| Casandra Prunica | 8/10 | 4299 days | 0% |
| Lauren Hedley | 7/10 | 4299 days | 0% |
| Janina Zwerver | 8/10 | 4299 days | 0% |
| Marieke Feyteres | 4/10 | 4303 days | 0% |
| van Linda Werner | 5/10 | 4303 days | 0% |
| Philip Donachie | 7/10 | 4313 days | 0% |
| Luisa Bach | 8/10 | 4313 days | 0% |
| Kristina | 7/10 | 4315 days | 0% |
| Eugen Lehner | 6/10 | 4316 days | 0% |
| Manuel Bach | 7/10 | 4316 days | 0% |
| Matthias Freiling | 2/10 | 4323 days | 0% |
| Debora Grusler | 6/10 | 4326 days | 0% |
| Andreas Brodhaeker | 8/10 | 4339 days | 0% |
| Renee van der Syde | 7/10 | 4340 days | 0% |
| Martha Horst | 8/10 | 4340 days | 0% |
| Roland Beer | 7/10 | 4344 days | 0% |
| Johanna Bak | 4/10 | 4344 days | 0% |
| Lior Bakski | 9/10 | 4354 days | 0% |
| Bet | 9/10 | 4355 days | 0% |
| Memain | 8/10 | 4628 days | 1% |
| Konza | 7/10 | 4629 days | 1% |
| Steen Rausmussen | 8/10 | 4660 days | 1% |
| David Restell | 10/10 | 4690 days | 1% |
| Christina Rodewald | 9/10 | 4695 days | 1% |
| Hanneke P | 7/10 | 4721 days | 1% |
| Kohler | 9/10 | 4741 days | 1% |
| Alexandra van den Brack | 6/10 | 4749 days | 1% |
| Paul Lawrence | 9/10 | 4750 days | 1% |
| Abby Rushmer | 7/10 | 4751 days | 1% |
| Stephan Olivier | 7/10 | 4756 days | 1% |
| Stephan Olivier | 7/10 | 4756 days | 1% |
| Faassen | 8/10 | 4760 days | 1% |
| Julie Lamart | 8/10 | 4761 days | 1% |
| Adrian Weidell | 5/10 | 4957 days | 1% |
| Jonathan Tuthill | 9/10 | 5012 days | 1% |
| A Ormsby | 10/10 | 5024 days | 1% |
| Gillian Rowe | 10/10 | 5037 days | 1% |
| Ryan Pynappels | 8/10 | 5038 days | 1% |
| Peter Dellen | 8/10 | 5039 days | 1% |
| Jorg Steffens | 8/10 | 5039 days | 1% |
| Danielle & Jobbe | 9/10 | 5041 days | 1% |
| Christina | 6/10 | 5042 days | 1% |
| Jop Veldhuis | 7/10 | 5042 days | 1% |
| Paul Weidenfeld | 8/10 | 5043 days | 1% |
| Sophie Dorrepaal | 7/10 | 5043 days | 1% |
| Fannette Peyreplane | 5/10 | 5044 days | 1% |
| Norm Cooper | 7/10 | 5048 days | 1% |
| Gloria, Rose & An | 8/10 | 5048 days | 1% |
| A Sorg | 10/10 | 5048 days | 1% |
| Samplonius | 5/10 | 5051 days | 1% |
| Petra | 10/10 | 5051 days | 1% |
| Bethany Hamilton | 8/10 | 5055 days | 1% |
| suffolkhouse69 | 9/10 | 5056 days | 1% |
| a a | 8/10 | 5087 days | 1% |
| Julia Balionis | 7/10 | 5101 days | 1% |
| Julia Hartman | 3/10 | 5102 days | 1% |
| Fabienne Indergand | 7/10 | 5122 days | 1% |
| Waldemar Schuler | 9/10 | 5134 days | 1% |
| pepette31 | 7/10 | 5209 days | 1% |
| Craig Hathaway | 9/10 | 5361 days | 1% |
| Stephane Lebel | 9/10 | 5366 days | 1% |
| Rens Hemselmans | 7/10 | 5379 days | 1% |
| Isabell | 10/10 | 5381 days | 1% |
| Holly Cave | 5/10 | 5381 days | 1% |
| J Palmer | 6/10 | 5385 days | 1% |
| Liz & Jim | 10/10 | 5387 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5389 days | 1% |
| Simon Vickers | 2/10 | 5392 days | 1% |
| Leslie | 8/10 | 5405 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5406 days | 1% |
| Selina Mueller | 7/10 | 5407 days | 1% |
| Tamlin Barton | 3/10 | 5408 days | 1% |
| Cara Dungay | 8/10 | 5409 days | 1% |
| Bottcher | 10/10 | 5409 days | 1% |
| Alexandra | 10/10 | 5410 days | 1% |
| Philipp Rau | 7/10 | 5412 days | 1% |
| Dan Aldridge | 9/10 | 5414 days | 1% |
| John Allen | 8/10 | 5416 days | 1% |
| Curtis Penner | 8/10 | 5416 days | 1% |
| Brandt | 8/10 | 5418 days | 1% |
| Nadia Husain | 5/10 | 5421 days | 1% |
| T J Andrews | 6/10 | 5437 days | 1% |
| Charli Skinner | 7/10 | 5688 days | 1% |
| Carl_Larsen | 10/10 | 5697 days | 1% |
| Susan & Richard | 10/10 | 5758 days | 1% |
| Rik | 9/10 | 5759 days | 1% |
| Jonathan Martin | 7/10 | 5761 days | 1% |
| Gunda G | 9/10 | 5766 days | 1% |
| Aaron | 8/10 | 5768 days | 1% |
| Will Jemma | 6/10 | 5771 days | 1% |
| Christen Hans | 10/10 | 5772 days | 1% |
| Monica and Danie. | 7/10 | 5780 days | 1% |
| Stephen | 5/10 | 5782 days | 1% |
| Susan | 10/10 | 5782 days | 1% |
| snodge | 8/10 | 5786 days | 1% |
| Bo Moenstead | 9/10 | 5795 days | 1% |
| Alain Deslandres | 8/10 | 5799 days | 1% |
| Jakob Jurgen | 10/10 | 5800 days | 1% |
| EA Anders | 8/10 | 5803 days | 1% |
| Helen and Hans Walser | 1/10 | 5806 days | 0% |
| kevinp | 8/10 | 5829 days | 1% |
| warrenp | 9/10 | 5833 days | 1% |
| braunweiler | 9/10 | 5837 days | 1% |
| pimn | 9/10 | 5842 days | 1% |
| asiacritics | 7/10 | 5848 days | 1% |
| Chris Mackamul | 8/10 | 5855 days | 1% |
| Debbie Rathbone | 10/10 | 5855 days | 1% |
| Lisette X | 9/10 | 5856 days | 1% |
| Martin | 10/10 | 5858 days | 1% |
| Thomas Willi | 10/10 | 5858 days | 1% |
| Elodie | 7/10 | 5859 days | 1% |
| richardh | 7/10 | 5973 days | 1% |
| trvlbug | 8/10 | 6001 days | 1% |
| glennandjen | 10/10 | 6062 days | 1% |
| BryonyS | 9/10 | 6080 days | 1% |
| Marion | 9/10 | 6096 days | 1% |
| Mikey | 7/10 | 6097 days | 1% |
| Richard Komzik | 6/10 | 6098 days | 1% |
| Michael Walsall | 10/10 | 6102 days | 1% |
| Anna | 8/10 | 6116 days | 1% |
| Abigail | 7/10 | 6116 days | 1% |
| lannie | 7/10 | 6126 days | 1% |
| SimonR | 8/10 | 6126 days | 1% |
| SonjaG | 7/10 | 6126 days | 1% |
| Chris | 8/10 | 6133 days | 1% |
| AurelieD | 8/10 | 6139 days | 1% |
| Yunker | 10/10 | 6141 days | 1% |
| Andrew | 8/10 | 6143 days | 1% |
| Erin | 9/10 | 6143 days | 1% |
| Christopher Gallaga | 8/10 | 6149 days | 1% |
| Amy | 10/10 | 6154 days | 1% |
| Shona | 8/10 | 6154 days | 1% |
| plumbaum | 9/10 | 6157 days | 1% |
| Sandra | 10/10 | 6165 days | 1% |
| Evangelista | 8/10 | 6165 days | 1% |
| Oliver | 5/10 | 6167 days | 1% |
| Kat | 9/10 | 6197 days | 1% |
| Lisa | 8/10 | 6224 days | 1% |
| siobhan | 8/10 | 6226 days | 1% |
| Alice | 8/10 | 6226 days | 1% |
| NORTZ | 7/10 | 6254 days | 1% |
| Stefan | 8/10 | 6256 days | 1% |
| Hugh Trenchard | 9/10 | 6272 days | 1% |
| Niamh | 4/10 | 6279 days | 1% |
| Jenny | 9/10 | 6303 days | 1% |
| Louise | 8/10 | 6312 days | 1% |
| Peddy | 10/10 | 6322 days | 1% |
| Katie Wise | 8/10 | 6325 days | 1% |
| Thomas Bachmann | 8/10 | 6341 days | 1% |
| Daniala | 8/10 | 6360 days | 1% |
| Tom Ben | 9/10 | 6463 days | 1% |
| Sarah Maudsley | 8/10 | 6478 days | 1% |
| Alan Bellerby | 8/10 | 6478 days | 1% |
| Tina Daly | 5/10 | 6484 days | 1% |
| John Woodrow | 8/10 | 6493 days | 1% |
| Ernst Seter | 9/10 | 6493 days | 1% |
| Jim Curley | 7/10 | 6504 days | 1% |
| Daniel | 7/10 | 6505 days | 1% |
| Marc Hertogs | 7/10 | 6508 days | 1% |
| Laura Sutton | 5/10 | 6532 days | 1% |
| Jeroen | 5/10 | 6534 days | 1% |
| Mum! | 6/10 | 6534 days | 1% |
| Gail | 9/10 | 6538 days | 1% |
| Heike Julia | 6/10 | 6539 days | 1% |
| Lanni | 8/10 | 6539 days | 1% |
| Amanda Finger | 7/10 | 6540 days | 1% |
| Desiree Muri | 7/10 | 6540 days | 1% |
| Jan Grzejik | 8/10 | 6567 days | 1% |
| Wouter Ewalts | 8/10 | 6574 days | 1% |
| Matilde | 6/10 | 6582 days | 1% |
| Kim | 6/10 | 6779 days | 1% |
| Gillian | 8/10 | 6821 days | 1% |
| Denise Nick | 6/10 | 6831 days | 1% |
| ranker_110 | 8/10 | 6850 days | 1% |
| Jasper | 7/10 | 6857 days | 1% |
| Mary | 8/10 | 6857 days | 1% |
| Lucy | 6/10 | 6857 days | 1% |
| Lukas | 8/10 | 6868 days | 1% |
| Hanna | 7/10 | 6870 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
6.07% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.